The choir is unusually long, and from the north and south aisles open chapels and chantries, in some of which the carving is very rich and fine. The Bishop's throne is elaborately carved, and more than sixty feet high, and yet there is not one nail in it. During the Commonwealth a brick wall was built across the west end of the choir, completely dividing the Cathedral. This was done to satisfy the Presbyterians and Independents, each of whom wished to hold their services here, and the two churches formed by this division were called Peter the East and Peter the West. The screen in the west front was added after the Cathedral was finished; it is covered with statues in niches, figures of 'kings, warriors, saints, and apostles, guardians as it were of the entrance to the sanctuary.' High above them, in the gable niche, is the statue of St Peter, to whom the Cathedral is dedicated. King Edward and Queen Eleanor kept Christmas at Exeter in 1285, and here the King held the Parliament which passed the Statute of Coroners that is still law. During this visit the King gave leave to the Bishop and Chapter to surround the close with a wall and gates, for at this time it was used to heap rubbish upon, and 'the rendezvous of all the bad characters of the place.' Edward III granted his eldest son the Duchy of Cornwall--a grant that carried with it the Castle of Exeter, and to the King's eldest son it has always since belonged. Henry VI in 1482 visited the city in peace and splendour. Margaret, his Queen, came about eighteen years later, while Warwick's plans were ripening, and the event is marked in the Receiver's accounts by the entry: 'Two bottles of wine given to John Fortescue, before the coming of Margaret, formerly Queen.' Not long afterwards Warwick and the Duke of Clarence fled to Exeter, which had to stand a siege on their behalf; but the effort to take the city was half-hearted, and in twelve days the attempt was abandoned. Edward IV arrived in pursuit, but too late, for 'the byrdes were flown and gone away,' and a quaint farce was solemnly played out. The city had just shown openly that its real sympathies were Lancastrian, but neither King nor citizens could afford to quarrel. 'Both sides put the best face on matters; the city was loyal; the King was gracious ... the citizens gave him a full purse, and he gave them a sword, and all parted friends.'